Selection Sort

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Sort
{
    class Program
    {
        static void Main(string[] args)
        {
            Random rnd = new Random();
            int[] arr = new int [80];
            for (int i = 0; i < arr.Length; i++)
            {
                arr[i] = rnd.Next(700);
            }
            SelectionSort(arr);
            foreach (var item in arr)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine();
        }
        static void SelectionSort(int[] arr)
        {
            for (int i = 0; i < arr.Length; i++)
            {
                for (int j = 0; j < arr.Length; j++)
                {
                    if (arr[i] < arr[j])
                    {
                        var tmp = arr[i];
                        arr[i] = arr[j];
                        arr[j] = tmp;
                    }
                }
            }
        }
    }
}